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Tear Jerker: Fragile Dreams Farewell Ruins Of The Moon
After going through a large underground shopping complex with PF (Personal Frame, a robot made to assist its owner), you find a place to go to the surface. PF tells Seto that her occupational limit has been reached, and when Seto asks what she means, she keeps repeating "Warning: Battery low" which causes him to panic. He puts her on the ground and asks her what he should do, but by then battery has been depleted. But then PF comes back to life for just one minute and tells Seto how glad she is that she met him, and expresses regret about not even asking for his name. Her final words are "When all is said and done, I am glad to have met you." Seto holds PF in his arms and tells her, and then digs her a grave.
Many of the memory items are truly heartbreaking. Even more so after The Reveal.
In the class photo memory, the speaker notes that he had a very good life filled with little hardship. However, as he nears death, the realization hits him that he has no one to share this life with. The last line really pummels this anguish in: "... I'm scared."
In an interview with the director, producer, writer and designer Kawashima Kentarou he states that the glass cage project gave humans the ability to empathize without the use of words and they died when they used this power. So the survivors of the world are people who have never used this ability and thus, are truly alone in the world.
Everything about Crow's "death"...Just like PF, he begins speaking in monotone and repeating himself like a broken doll, before becoming coherent just for enough time to give a heartfelt goodbye to Seto.
The reveal before his death can also lead to to the realization that the humanoid robots you fight shortly afterword are the same model he was since they all have his voice as their dying screams. This can make it sound as if you keep hearing Crow dieEVERY time you kill one of them, which you may end up doing A LOT.
The creepy Chicken Merchant's love for his dead child "princess"...Just the fact that he probably reached Heroic BSOD and deluded himself into becoming the silly, naive collector of junk long ago and never recovered.